Bicycle frame



FIG. 1 is a front perspective view of the bicycle frame showing my new design with the phantom lines depicting solely environmental structure and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is rear elevational view thereof;

FIG. 6 is left side elevational view thereof; and,

FIG. 7 is bottom plan view thereof. 

The ornamental design for a bicycle frame, as shown and described. 